39.4″ · 1,002 mm wide · 1.38″ (35 mm) frame · 41.9 lb (19 kg)

Solar panelAXITEC

AXITEC AC-310MH/120S

Name: AXITEC AC-310MH/120S
Brand: AXITEC

120 half-cut cells. Power classes 305–340 W in the CEC list; datasheet covers 310–335 W.

CEC listed · Aug 15, 2019UL 170315-yr product + 25-yr performance warrantySeen in 2 SoCal permits

Power class

Power (STC)310 Wtolerance +5 / −0 W
Efficiency≥18.7%datasheet minimum
%/°C Pmax−0.39CEC test: −0.365
Output at year 2585%performance warranty

Power classes

CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation · AXITEC datasheet · 8 models

Model	Pmax	Voc, V	Isc, A	Vmp, V	Imp, A	Efficiency	PTC	CEC listed
AC-305MH/120S	305 W	39.42	9.86	32.37	9.42	≈18.1%	283 W	Aug 15, 2019
AC-310MH/120S	310 W	39.58	9.95	32.58	9.51	≥18.7%	288 W	Aug 15, 2019
AC-315MH/120S	315 W	39.74	10.04	32.79	9.60	≥19.0%	293 W	Aug 15, 2019
AC-320MH/120S	320 W	39.92	10.13	33.01	9.69	≥19.3%	298 W	Aug 15, 2019
AC-325MH/120S	325 W	40.10	10.43	32.71	9.93	≈19.3%	304 W	Jan 13, 2020
AC-330MH/120S	330 W	40.27	10.51	32.91	10.02	≈19.6%	308 W	Jan 13, 2020
AC-335MH/120S	335 W	40.44	10.60	33.11	10.11	≈19.9%	313 W	Jan 13, 2020
AC-340MH/120S	340 W	40.62	10.69	33.31	10.21	≈20.1%	318 W	Jan 13, 2020

≈ efficiency = Pmax ÷ panel area 1.687 m² (datasheet size) for classes outside the datasheet.

Build & dimensions

AXITEC datasheet · Cali-Graf calculation

Dimensions66.3 × 39.4 × 1.38 in1,684 × 1,002 × 35 mm
Module area1.69 m² (18.2 ft²)length × width
Weight41.9 lb (19 kg)
Cells120 half-cut cells
Back coverComposite film
Frame1.38 inch (35 mm) black aluminium frame

Heat & cold behaviour

AXITEC datasheet · CEC PV Module List (Oct 7, 2026) · Cali-Graf calculation

	Datasheet	CEC listing test
Pmax coefficient γ	−0.39 %/°C	−0.365 %/°C
Voc coefficient β	−0.29 %/°C	−0.284 %/°C
Isc coefficient α	+0.04 %/°C	+0.042 %/°C
Vmp coefficient	≈ −0.43 %/°C	—
Operating cell temperature	NMOT 45 °C	NOCT 44.6 °C

Vmp coefficient ≈ γ − α (datasheet); used only for the hot-roof voltage estimate.

Away from lab conditions — CEC listing test points

Class	Pmax at NOCT	Vmp × Imp at NOCT	Pmax at 200 W/m²	Low-light efficiency vs STC
305 W	221 W	30.06 V × 7.35 A	56.9 W	93%
310 W	224.6 W	30.26 V × 7.42 A	57.8 W	93%
315 W	228.2 W	30.45 V × 7.49 A	58.8 W	93%
320 W	231.9 W	30.66 V × 7.56 A	59.7 W	93%
325 W	243 W	31.17 V × 7.8 A	62.5 W	96%
330 W	246.7 W	31.36 V × 7.87 A	63.5 W	96%
335 W	250.5 W	31.55 V × 7.94 A	64.5 W	96%
340 W	254.5 W	31.74 V × 8.02 A	65.5 W	96%

Pmax = Vmp × Imp from the CEC listing; low-light efficiency = Pmax at 200 W/m² ÷ (20% of STC Pmax).

Electrical & strength ratings

AXITEC datasheet

Max system voltage1,000 V (UL)
Max reverse current20 A
Fire rating (UL 61730)Type 1
Power tolerance+5 / −0 W

Packaging: 30 per pallet

Certifications

CEC PV Module List (Oct 7, 2026) · AXITEC datasheet

UL 1703IEC 61730Fire rating Type 1 (UL 61730)

UL 1703CEC listing
IEC 61730datasheet
Fire rating Type 1 (UL 61730)datasheet

Warranty & degradation

AXITEC datasheet

Product warranty15 years
Performance warranty25 years
Year 25≥ 85%

Inverter compatibility & string sizing

AXITEC datasheet · Cali-Graf calculation · NLR PVWatts v8 · CEC PV Module List (Oct 7, 2026) · inverter datasheets · NLR SAM inverter library · CEC Grid Support Inverter List (Oct 7, 2026)

CityColdest air, °CHottest cell, °CString inverter

42.2 V

Voc when cold

per panel

25.7 V

Vmp when hot

per panel

Max panels / string

max DC 600 V

Min panels / string

MPPT from 60 V

Defaults come from NLR TMY weather (coldest hour, hottest modeled cell). Code calculations (NEC 690.7) use the ASHRAE extreme annual minimum, which is usually colder — enter it above.

String inverters most named in SoCal permits

Inverter	Max DC input	MPPT	Window source	Panels per string
Tesla 1538000-xx-y	600 V	60–480 V	datasheet	3–14
Solis (Ginlong) S6-EH1P10K-H-US	600 V	80–520 V	datasheet	4–14
Solis (Ginlong) Solis-1P7.6K-4G-US	600 V	100–500 V	datasheet	4–14
Qcells Q.VOLT H7.6SX	498 V	234–498 V	CEC test window	10–11

Microinverters (one per panel)

Microinverter	Recommended module power	Max DC input	MPPT	Voc cold / Vmp hot	Check	DC/AC
Enphase IQ8PLUS-72-2-US	235–440 W	60 V	29–45 V	42.2 / 25.7 V	⚠ Works; below MPPT at peak heat	1.07
APsystems (Alt Power System) DS3-L	265–570 W	60 V	28–45 V	42.2 / 25.7 V	⚠ Works; below MPPT at peak heat	0.4
Enphase IQ8M-72-2-US	260–460 W	60 V	30–45 V	42.2 / 25.7 V	⚠ Works; below MPPT at peak heat	0.95
Enphase IQ8A-72-2-US	295–500 W	60 V	32–45 V	42.2 / 25.7 V	⚠ Works; below MPPT at peak heat	0.89

Voltage check against the microinverter datasheets — confirm the pairing on the manufacturer’s module compatibility list. Rows appear only when the panel’s power is inside the microinverter’s recommended module power range.

SolarEdge and other optimizer-based systems size strings by the optimizer rules — use the manufacturer’s designer. Reference inverters: most named in SoCal permits since Oct 2024.

Expected production in Southern California

NLR PVWatts v8 · Cali-Graf calculation

PanelsCity for chartSystem size

City	kWh / kW / yr	kWh / panel / yr	kWh / system / yr	Sun, kWh/m²/day
Los Angeles	1,676	520	11,950	6.08
Palmdale	1,835	569	13,084	6.69
Chula Vista	1,696	526	12,092	6.11
Huntington Beach	1,643	509	11,715	5.89
Riverside	1,696	526	12,092	6.21
Santa Clarita	1,724	534	12,292	6.28

Estimate for comparison, not a quote: shading, roof orientation and local losses change real output. Roof mount, 20° tilt, south, 14% system losses.

Compare with similar 310 W panels

CEC PV Module List (Oct 7, 2026) · JinkoSolar datasheets · Kiwa PVEL Scorecard · building permits

Panel	Pmax	Efficiency	γ Pmax (CEC)	Voc, V	Isc, A	SoCal permits (series)
AXITEC AC-310MH/120S	310 W	≥18.7%	−0.365	39.58	9.95	2
JinkoSolar JKM310M-60HBL	310 W	≈18.4%	−0.407	40.5	9.92	45
REC Group REC310NP	310 W	≈19.1%	−0.351	40.2	10.01	4
Sinotec USA STS-310M3B-60	310 W	≈18.8%	−0.375	40.3	10.04	3

Same fields from the same sources for every row; ≈ efficiency is calculated from the listed area. Comparable series: other brands, same product group, power range covering this class.

Questions & answers

How efficient is the AXITEC AC-310MH/120S?

The AXITEC datasheet guarantees at least 18.7% module efficiency for the 310 W class (up to 19.3% for 320 W). 310 W over 1.69 m² equals about 184 W per square meter.

How much energy does one panel produce in Los Angeles or Palmdale?

PVWatts v8 with typical-year weather gives about 520 kWh per year per 310 W panel in Los Angeles and about 569 kWh in Palmdale (20° roof, facing south, 14% system losses).

How much power does it lose on a hot roof?

With γ = −0.39 %/°C, at a 77 °C cell temperature (hottest modeled hour in Palmdale) output is about 20.2% below the STC rating.

How many panels fit on one string?

With the Tesla 1538000-xx-y (max DC 600 V, MPPT from 60 V, datasheet) in Los Angeles the calculator gives 3–14 panels per string (Voc at 2 °C = 42.2 V, Vmp at 74 °C cell = 25.7 V). Final design must follow the inverter manual and NEC 690.7.

What does the warranty cover?

15 years on the product and 25 years on performance: at least 85% after 25 years (manufacturer datasheet).

How big and heavy is it?

66.3 × 39.4 × 1.38 in (1,684 × 1,002 × 35 mm), 41.9 lb (19 kg).

What fire rating does it have?

UL 61730 fire rating Type 1 per datasheet.

Sources

California Energy Commission — Solar Equipment Lists, PV Module List, Inverter List (snapshot Oct 7, 2026).
AXITEC — manufacturer datasheet “AC-285M/156-60S AC-290M/156-60S 310–335 Wp AC-295M/156-60S”.
AXITEC — manufacturer datasheet “AC-285M/156-60S AC-290M/156-60S 310–320 Wp AC-295M/156-60S”.
JinkoSolar — datasheet THE MOST DEPENDABLE SOLAR BRAND.
JinkoSolar — manufacturer datasheet “Eagle HC 60M G2 315-335 Watt MONO PERC HALF CELL MODULE”.
Kiwa PVEL — PV Module Reliability Scorecard, Top Performer lists.
NLR (formerly NREL) — System Advisor Model CEC inverter library (version 2026.7.3).
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Chula Vista, Huntington Beach, Riverside, Santa Clarita.
Inverter datasheets — APsystems (Alt Power System), Enphase, Solis (Ginlong), Tesla (manufacturer documents).
Building permits — Los Angeles County Public Works (EPIC-LA, unincorporated areas) (Dec 2019 – Apr 2020). Equipment matched from permit descriptions by model number.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).